Abstract: A disc drive actuator system includes an equalizer filter coupled between the controller and actuator plant of a disc drive actuator system. The filter applies a gain of less than unity gain to the actuator drive signals from the controller at the resonance frequency of the plant, and applies a gain greater than unity to the actuator drive signals at a selected frequency different from the plant resonance frequency to derive a system resonance frequency shifted from the plant resonance frequency. In one form the equalizer filter functions as a notch filter to attenuate signals at the plant resonance frequency, and functions as a peak filter to boost the gain of higher frequency signals over a band wide enough to ensure zero phase loss below the plant resonance frequency.

Abstract: In a method of writing clock data to a storage medium whilst the storage medium is rotating, a burst of clock data is read from a present track. A burst of clock data for a subsequent track on the storage medium is generated in accordance with the burst of clock data read from the present track and its phase adjusted. The phase adjusted burst of clock data is written to the subsequent track. The steps are repeated for plural bursts of clock data around a revolution of the storage medium thereby to write clock data to the subsequent track.

Abstract: A servo system and method for calibrating servo index positions of a magnetic tape for track following linear servo edges, each servo edge comprising an interface between dissimilar recorded servo signals, the edges on opposite lateral sides of a middle servo signal. A servo loop laterally positions a servo sensor where the servo signals are at estimated ratios representing the locations of the servo edges. An independent position sensor indicates the mechanical lateral position of the servo sensor at the sensed servo edges. The servo loop repositions the servo sensor to a plurality of lateral positions at predetermined displacements from the independent position sensor sensed servo edges, and track follows at each of the predetermined offsets.

Abstract: An information handling system, such as a disc drive, includes a base, a disc stack rotatably attached to the base, and an actuator assembly movably attached to the base. A region of the disc stack is identified as a parking band, and when power is not provided to the disc drive, the actuator assembly is held in a parked position within the parking band by a magnetic latch. The magnetic latch is overcome during a powerup process by a voice coil motor coupled to the actuator. Other regions of the disc stack are associated with various functions performed by the voice coil motor as the actuator passes over such regions.

Abstract: A servo controller controls the servo system in a disc drive. A proportional integrator component receives the target track signal indicative of a target track and a measured track signal indicative of actual or measured data head position. During seek mode, the proportional integrator provides an output signal based on the measured track signal and the target track signal. A profile generator component provides a profile signal based on the output signal from the proportional integrator. A coarse actuator is driven based on the profile signal. A filter component is coupled to the profile generator and filters the profile signal to provide a filtered profile signal. The fine actuator is driven based on the filtered profile signal.

Abstract: A method and apparatus for normalizing the acceleration constant used by a servo control system in a disc drive are disclosed. The method and apparatus involve performing a test seek and summing the position error measured at sample periods during the deceleration phase of the test seek. A correction factor applied to the acceleration constant is adjusted if the sum of the position errors differs from the sum of position errors measured from a nominal seek. Adjusting the correction factor to cause a position error sum that is close or equal to the sum from the nominal seek provides a relatively symmetrical seek arrival without additional correction factor offsets or gain variances.

Abstract: A method and storage device are provided for initializing a polynomial linearizer in the storage device. The linearizer is initialized by identifying the coefficients of the linearizer polynomial. To reduce the computational intensity of this process, orthogonal-type coefficients for at least two orthogonal polynomials are identified, where the linearizer polynomial is formed as the sum of the orthogonal polynomials. The orthogonal-type coefficients are then combined to identify linearizer coefficients for the linearizer polynomial.

Abstract: A damped PCBA protective cover for reducing acoustic emissions in a disc drive assembly is disclosed. The disc drive assembly comprises a base, a circuit board mounted to the base and a cover fastened to the base and extending over the circuit board. A constrain layer is affixed to the cover that includes a stiffening member and a damping member disposed between the cover and the stiffening member. The constrain layer can be affixed to either side and dampens/absorbs vibrations generated during operation of the disc drive.

Abstract: A disc drive system includes a base plate, a spindle attached to the base plate, and at least one disc attached to the spindle. A cover is also included for attaching to the base plate. The cover and the base plate form a disc enclosure which encloses the at least one disc, a portion of the spindle, and the actuator assembly. The disc drive system also includes a mechanism for attenuating acoustical emissions produced by the spindle, the at least one disc, and the actuator assembly. The mechanism includes anechoic features formed on the interior of the disc enclosure, using a liner formed with the anechoic features or having the anechoic features formed integral on one or both of the cover and base plate.

Abstract: In at least one embodiment, a thin film write head having a conductor with a coil structure having a central axis perpendicular to an air bearing surface. The conductor having a first contact centrally located at a first end of the conductor. The conductor having plurality of contacts located distal from the first contact. The plurality of contacts having at least one contact on either side of the central axis of the write head.

Abstract: A dual etch depth slider air bearing surface includes a front pad disposed along the front and partially along the sides of the slider and a rear pad partially disposed along the rear of the slider, wherein a skewed center rail connects the front pad to the rear pad. Extending above the rear pad is a V-shaped ABS pad and extending above the front pad are two leading edge ABS pads that are separated by a channel towards the longitudinal center of the slider. The design enables the slider to fly much higher over the landing zone of the disk than at the data zone and provides for a steep take off profile followed by a rapid descend over the data zone.

Abstract: A magnetic data transducing head slider is provided with a transversely extended crossbar or other barrier near the leading edge. The barrier is deposited onto the air bearing surface of the slider using photolithographic techniques that enable precise determination of the barrier dimensions and the barrier set-back from the leading edge. The barrier set-back, width and thickness can be selected to control the transducer flying height and the pitch of the slider relative to the data recording surface of a magnetic disk when the slider is aerodynamically supported relative to the disk. The barrier also acts as a shield to minimize particulate contamination.

Abstract: A disk device includes a chassis base, at least one disk rotatably supported on the chassis base, at least one carriage arm pivotable about an axis on one end and, at the other end, having a slider with a read/write head and a load bar extending from the slider, a ramp member attached to the chassis base at a position outside the disk, the ramp member having a guiding part and a parking part, and an actuator for driving the carriage arm between a loaded position in which the slider is held above the disk and an unloaded position in which the load bar rests on the parking part of the ramp member. The ramp member is provided with cleaning structure for removing powder attached to the load bar as the load bar moves along the parking part.

Abstract: A microactuator is formed by defining stator and rotor regions on a wafer. Isolation barriers are formed in the stator and rotor regions to define a isolation regions. Conductive suspension beam are formed between the first and second isolation regions, and wafer material between the stator and rotor regions is removed to form a stator and a rotor. The microactuator is arranged to position a load device having an electrical component. The suspension beams support the rotor and load device and provide electrical connection between the stator and rotor for the microactuator and/or the load device.

Abstract: A magneto-resistance effect head (MR head) is provided, wherein a lower electrode-cum-magnetic shield layer is provided on a substrate, a magnetic gap adjusting layer is provided thereon, a magneto-resistance effect element (MR element) is provided on the magnetic gap adjusting layer, and an upper electrode-cum-magnetic shield layer is provided on the MR element. A pair of vertical bias layers is provided at both sides of the MR element. In the MR element, a lower layer, a free magnetic layer, a nonmagnetic layer, a fixed magnetic layer, and a fixing layer are provided in order from the magnetic gap adjusting layer side. By providing the magnetic gap adjusting layer between the lower electrode-cum-magnetic shield layer and the free magnetic layer, the free magnetic layer can be made to be sufficiently separate from the lower electrode-cum-magnetic shield layer. Thereby, since a sufficient leak magnetic field can be applied to the free magnetic layer, the head reproduction output is improved.

Abstract: A spin valve sensor is provided with a biasing layer which produces a demagnetizing field which supports a demagnetizing field from a pinned layer structure in counterbalancing a sense current field on the free layer structure. The biasing layer has a high resistance so that a sense current is not excessively shunted therethrough and is a specular reflector so as to reflect conduction electrons to increase a magnetoresistive coefficient dr/R of the sensor. In the preferred embodiment the pinned layer structure is an antiparallel (AP) pinned layer structure.

Abstract: A tunnel junction sensor according to the invention replaces the prior art free layer with a free layer structure which allows a wider range of magnetoresistive materials to be used. The preferred free layer structure of the invention includes a negative magnetostriction layer which allows use of magnetoresistive materials which otherwise have unacceptably high magnetostriction values. The materials and thicknesses of the layers are selected to result in a total magnetostriction near zero even though magnetoresistive material with high magnetostriction is included. The preferred embodiment includes a softening layer of material such as selected compositions of nickel-iron which maintain the desired magnetic softness of the free layer structure and have a magnetostriction constant near zero.

Abstract: A dual active element magnetoresistive tape read head uses weak biasing of active layers to reduce Barkhausen noise. The read head includes a first insulator layer. A first active magnetoresistive layer is built on the first insulator layer. A second insulator layer is built on the first active magnetoresistive layer. A second active magnetoresistive layer is on the second insulator layer. The second active magnetoresistive layer is magnetostatically coupled to the first active magnetoresistive layer. A third insulator layer is on the second active magnetoresistive layer. At least one insulator layer is a biasing layer comprised of an electrically nonconductive antiferromagnetic material.

Abstract: A method for interrupting current is provided wherein substantially all current is conveyed through a normal current carrying path in a circuit interrupter. A movable element is displaced for interruption of the current, and a balance is struck between the normal current carrying path and a parallel alternative or transient current carrying path. The transient current carrying path includes at least one variable or controllable resistance element. The transient current carrying path presents a substantially open circuit during normal operation. The variable resistance elements have a lower resistance during initial phases of circuit interruption, favoring transition of all current from the normal current carrying path to the transient path. Thereafter, the variable resistance elements increase in resistivity, producing additional back-EMF to drive the fault current to a zero level and to limit let-through energy.

Abstract: A hermetic motor protector (10) has a non-current carrying snap-acting thermostatic disc (26) freely disposed on a disc seat (22a) having a tab (22c) projecting through a centrally located aperture (26a) in the disc. An outer peripheral portion of the disc is received under a leg (22e) of the bracket limiting upward motion of the disc at that location and causing the disc to act as a lever pivoting about the disc seat (22a) as a fulcrum so that the outer peripheral portion of the disc diametrically opposite to leg (22e) engages a motion transfer bump (28d) formed on a movable contact arm cantilever mounted on leg (22e) when the disc snaps from its normally contacts engaged configuration to its opposite dished contacts open configuration when the disc is heated to its actuation temperature by a heater element (24) along with heat conducted from a motor with which the protector is used.

Abstract: The present invention relates to a reverse bias protection structure which comprises a PMOS transistor structure having a drain portion, a gate portion, a source portion and a backgate portion, wherein the gate portion is coupled to a first voltage potential, the source portion is selectively coupleable to a power supply, and the drain portion is selectively coupleable to a circuit needing power to be supplied thereto from the power supply. The reverse bias protection structure further comprises a Schottky diode structure having an anode coupled to the source portion of the PMOS transistor structure, and a cathode coupled to the backgate portion of the PMOS structure. Under forward bias conditions, the PMOS transistor conducts and exhibits a small voltage drop thereacross. Under reverse bias conditions, the PMOS transistor is off and the Schottky structure is reverse biased, thus preventing current through the protection structure.

Abstract: This invention provides a circuit and a method for protecting electronic circuits from electrostatic damage ESD. The invention teaches a dynamic floating silicon-controlled rectifier SCR for use as an ESD clamp. The n-well of the SCR is biased to the supply voltage Vdd under normal conditions to provide good latch-up performance. During ESD events, the n-well is floated to improve clamping performance. In addition, this invention utilizes a floating-well control circuit which provides better latch-up immunity during normal operation after the ESD event has passed.

Abstract: In a microcomputer equipped with a built-in temperature sensor, diodes as a temperature sensor are incorporated in a pair of circuit blocks, respectively, and placed in opposite polarity connection to each other. When detecting a temperature of the microcomputer, a constant current If is supplied to the diodes through terminals commonly connected to both the diodes. A voltage Vf generated at each diode is read through terminals located at more adjacent nodes to the diode when compared in position with the terminals.

Abstract: A dimmer comprises a PWM circuit for driving through pulse width modulation and a switching device formed on the same chip. The switching device has a driving circuit, an overheat cut-off protecting circuit, a main control FETQA to be a semiconductor switch, a first reference FETQB for generating a reference voltage and a resistor. Furthermore, overcurrent detecting means is implemented by a comparator for detecting a difference between the reference voltage and a drain—source voltage of the main control FETQA and an output thereof cuts off and controls the driving circuit so that the main control FETQA is ON/OFF controlled. The overcurrent detecting means and ON/OFF control means have a soft start function of suppressing a rush current flowing to loads of an illuminating system.

Abstract: A lightning protection system including a monitoring system (10) for detecting dangerous atmospheric conditions within specific geographic zones, a transmission system (12) for sending control codes, and multiple circuit connection/disconnection devices (16) for electrically connecting to electronic equipment to be protected. The lightning protection system (10) protects electrical and electronic equipment (18) by detecting and locating dangerous atmospheric conditions in a particular geographic area and transmitting broadcast control commands to electrical circuit connection/disconnection devices (16) in the geographic area, which have a receiver for receiving the broadcast control commands and an interruption mechanism (16) for disconnecting and reconnecting the electrical equipment from external conductors in response to the control commands. The monitoring system (10) may consist of multiple detectors located in different geographic areas.

Abstract: A lightning suppression system including a first wire, a second wire, a third wire, a fourth wire, an enclosure having an interior volume, a first coil connected to the first wire and positioned within the enclosure, a second coil connected to the second wire and positioned within the enclosure, a third coil connected to the third wire and positioned within the enclosure, a fourth coil connected to the fourth wire and positioned within the enclosure, and a piece of electronic equipment interconnected to each of the coils. A conductive grit, such as steel shot, fills a portion of the enclosure around the respective coils. The lightning suppression system is for interconnection to a first twisted pair of wires and a second twisted pair of wires associated with a T1 circuit or a DSL circuit.

Abstract: A needle-card adjusting device for planarizing needle sets on a needle card, in which the needle card is connected to a circuit board used as a contact interface to a test head. The needle-card adjusting device has a separate, dynamically operating adjusting unit for adjusting the needle-card.

Abstract: A relay controller intermittently connects a power supply across a relay coil with a controlled duty cycle whenever the relay coil is to generate a magnetic field for opening or closing the relay's contacts. The duty cycle with which the controller connects the power supply across the coil controls limits a steady-state amplitude of current passing through the coil, thereby controlling the intensity of the magnetic field the coil generates.

Abstract: A controller for an electromagnetic actuator is provided that enables detection of a minute movement of the armature leaving the seating position and carries out pullback operation responsive to such detection. The electromagnetic actuator has a pair of springs acting on opposite directions, and an armature coupled to a mechanical element such as a exhaust/intake valve of an automobile engine. The armature is held in a neutral position given by the springs when the actuator is not activated. The actuator includes a pair of electromagnets for driving the armature between two end positions. The controller having current supplying means for supplying holding current to the electromagnet corresponding to one of the end positions when holding the armature in said one of the end positions.

Abstract: Simultaneous neutralization and monitoring of charge on a moving dielectric material is achieved with ionizing devices that supply ions in proximity to the material to thereby substantially neutralize charge on the material, and with circuitry that senses the ion currents flowing from the ionizing devices to the material. A controller can be utilized to control the ionizing devices and/or calculate various parameters (such as charge densities on the web, efficiency, etc.) based on the sensed ion currents.

Abstract: A dispenser having a reservoir for holding a web characterized by a web dielectric constant and a charging station for charging the web by tribocharging when the web is removed from the reservoir. The charging station has a first charging strip includes a first material having a first dielectric constant different from the web dielectric constant and a contact mechanism for pressing web against the charging strip as the web is removed from the reservoir. The contact mechanism may include a second charging strip having a second material with a second dielectric constant different from the web dielectric constant, the web passing between the first and second charging strips.

Abstract: A mobile telephone device fitted with a transmitter and a receiver each having a high-frequency component with an integrated decoupling capacitor. The high-frequency component includes a substrate with the decoupling capacitor on one surface thereof, first and second current supply terminals for the capacitor on the same surface of the substrate as the capacitor, one capacitor electrode connected to a high frequency circuit and a DC voltage source, also on the one surface of the substrate, and the other capacitor electrode connected to ground.

Abstract: A method for the fabrication of a cap layer on a top electrode layer of a ferroelectric capacitor includes the steps of depositing an amorphous layer, usually made of Sr(x)Ru(y)O3, on the top electrode and then annealing the amorphous layer in two stages in order convert the amorphous layer into the cap layer. The first anneal is performed at 500° C. to 700° C. in a non-oxidizing atmosphere, such as nitrogen, and converts the amorphous layer into a crystallized layer of Sr(x)Ru(y)O3. The second anneal is performed at 300° C. to 500° C. in an oxidizing atmosphere, such as oxygen, and converts the crystallized layer into the cap layer. The method is applied to the formation of a ferroelectric capacitor element of an integrated semiconductor device.

Abstract: Implantable heart-monitoring devices, such as defibrillators, pacemakers, and cardioverters, detect onset of abnormal heart rhythms and automatically apply corrective electrical therapy, specifically one or more bursts of electric charge, to abnormally beating hearts. Critical parts in these devices include the capacitors that store and deliver the bursts of electric charge. Some devices use flat aluminum electrolytic capacitors have cases with right-angle corners which leave gaps when placed against the rounded interior surfaces of typical device housings. These gaps and voids not only waste space, but ultimately force patients to endure implantable devices with larger housings than otherwise necessary. Accordingly, the inventors devised several capacitor structures that have curved profiles conforming to the rounded interior surfaces of device housings.

Abstract: A solid electrolytic capacitor having an anode that contains a valve-action metal (e.g., tantalum, niobium, and the like) and a dielectric film overlying the anode is provided. The capacitor also include a protective coating overlying the dielectric film, wherein the protective coating contains a relatively insulative, resinous material. For example, in one embodiment, the resinous material can be a drying oil, such as olive oil, linseed oil, tung oil, castor oil, soybean oil, shellac, and derivatives thereof. The capacitor also includes a conductive polymer coating overlying the protective coating. As a result of the present invention, it has been discovered that a capacitor can be formed that can have a relatively low leakage current, dissipation factor, and equivalents series resistance.

Abstract: A keyboard device for a personal digital assistant (PDA) includes first and second casing members that are pivotally interconnected, and a keyboard module mounted on inner surfaces of the casing members. The inner surface of one of the casing members further has a support frame for adjustably supporting the PDA. A connector unit on the support frame connects electrically the PDA to the keyboard module.

Abstract: A portable computer includes a portable computer body having an upper surface, a lower surface and a lower front edge thereof. An add-on battery is detachably mounted on the lower surface of the portable computer body and has a wedge-shaped portion corresponding to a wedge-like space which is defined between the lower surface of the portable computer body and a surface on which the portable computer body is placed, when the portable computer body is placed to be inclined about the lower front edge of the portable computer body. The portable computer body is, when it is equipped with the add-on battery, inclined in such a manner that the upper surface of the portable computer body is lower at a front edge thereof.

Abstract: A fastening device is provided to assemble a first unit and a second unit. The first unit has a first cover and the second unit has a second cover. The fastening device comprises a positioning post mounted on the first cover; a positioning aperture positioned on the second cover; a sliding piece mounted on the second cover and having at least one arm of which a slant edge slants upward along a first direction; a resilient element of which one end is fixed on the sliding piece and the other end is fixed on the second cover for making the sliding piece move with the resilient element on the second cover; and an operating key being mounted on the upper end of the sliding piece such that a user can push the sliding piece along the first direction by means of the operating key.

Abstract: A protective cover with ternary structure applied in an electronic product comprises a conjoint plate, a flexible plate connected to the conjoint plate, and a fastening plate connected to the flexible plate. The fastening plate snaps the bottom cover for covering the expansion slot of the electronic product. Also, the conjoint plate, the flexible plate, and the fastening plate are integrated as a whole by double injection technique, and the flexibility of the flexible plate controls the protective cover being closed or opened.

Abstract: A technique for increasing the thermal capability of a portable electronic device includes transferring dissipated heat from a heat source disposed within the portable electronic device to at least one heat exchanger via at least one respective thermal transfer device. This may be in addition to another heat exchanger connected to the heat source via another thermal transfer device. At least one external fan is disposed adjacent to the at least one heat exchanger and dissipated heat transferred from the heat source to the at least one heat exchanger is removed via a flow of air generated by the at least one external fan. This may be in addition to an internal fan disposed adjacent the another heat exchanger to dissipate heat transferred from the heat source to the anther heat exchanger via flow of air generated by the internal fan. The at least one thermal transfer device may be a heat pipe. The portable electronic device may be a notebook computer and the heat source disposed therein may be a processor.

Abstract: A computer chassis includes heat generating components and a fan housing adjacent the components. A plate is mounted in the fan housing. A first flexible member extends from the plate. A second flexible member extends from the plate and is spaced apart from the first member. A grip member interconnects a distal end of the first and second members spaced apart from the plate. A latch extends from adjacent the grip member. An anti-buckle member extends between the first and second members for maintaining the flexible members spaced apart.

Abstract: A cooling system and method of fabrication are provided for cooling a heat-generating electronic element within a portable computer. The cooling system includes a cold plate assembly coupled to a heat-generating electronic element, and a heat exchange assembly disposed within the cover of the portable computer. The heat exchange assembly includes a hollow channel for carrying coolant, as well as a thermally conductive plate and air-cooled fins. The hollow channel is coupled to one main surface of the plate, while the air-cooled fins are coupled to an opposite main surface of the plate. A conduit carries coolant between the cold plate assembly and the hollow channel of the heat exchange assembly, and a circulation pump circulates coolant through the conduit between the cold plate assembly and the heat exchange assembly in a manner to remove heat from the heat-generating electronic component.

Abstract: A thermal connector to transfer heat from one PCB to another, without interfering with the convenient removal and replacement of the PCBs and without increasing the force required to connect or deconnect the PCBs. The thermal connector comprises a first part, fixedly attached to one PCB and thermally coupled to the end portion of a first heat pipe (thermally coupled to the device to be cooled) and a second movable part, adapted to firmly grasp the end portion of the first pipe and a second heat pipe thermally connected to a cooling system.

Abstract: A module and a corresponding connector that include multiple rows of contacts is described. In one embodiment, the module may include a channel formed in a bottom edge of the module. A plurality of contacts may be disposed on the inner surface of the channel and the outer surface of the module. A complementary connector is also described.

Abstract: A high frequency signal switching unit includes a printed circuit board accommodated in the casing and having a ground layer formed on substantially one entire surface thereof. Input and output terminals are mounted on the casing, and a high frequency relay is mounted on the printed circuit board for switching between the input terminal and the output terminal. The high frequency relay has a plurality of relay contact terminals and a grounding terminal. A plurality of coaxial cables having respective internal and external conductors connect the input and output terminals to the relay contact terminals. The grounding terminal of the high frequency relay and the external conductors of the coaxial cables are connected to the ground layer of the printed circuit board, while each of the internal conductors of the coaxial cables is connected to one of the relay contact terminals of the high frequency relay.

Abstract: An output of a voltage regulator is a core voltage line that runs adjacent to a die attach area on a packaging substrate. An input of the voltage regulator is typically coupled to a power supply which, in one embodiment, is also an I/O voltage line that runs adjacent to the die attach area. In one embodiment, the core voltage line is shaped as a ring encircling the die attach area on the packaging substrate. In another embodiment, the I/O voltage line is also shaped as a ring encircling the die attach area on the packaging substrate. Further, a semiconductor die having at least one I/O Vdd bond pad and at least one core Vdd bond pad can be mounted in the die attach area. The I/O Vdd bond pad and the core Vdd bond pad can be connected, respectively, to the I/O voltage ring and the core voltage ring.

Abstract: Self-aligning combination of a substrate with a chip is provided, using reverse patterns of raised recesses and raised shapes on the respective substrate and chip surfaces. High-force contact bump production is avoided. Reliable contact between a chip and substrate is achieved, with minimized skewing after chip placement.

Abstract: In some embodiments, the invention includes a termination card having a substrate having groups of fingers on a first side of the substrate and groups of fingers on a second side of the substrate and wherein some of the groups of fingers on the first side and some of the groups of fingers on the second side are connected through module connectors, and others of the groups of fingers on the first side are coupled to on module terminations on the first side.

Abstract: In some embodiments, the invention includes a system having first and second modules and a circuit board including first and second module connectors to receive the first and second modules, respectively. The system includes a first path of conductors extending from the circuit board to the first module connector, to the first module, back to the first module connector, to the circuit board, to the second module connector, to the second module, and to on module terminations of the second module; and a second path of conductors extending from the circuit board to the second module connector, to the second module, back to the second module connector, to the circuit board, to the first module connector, to the first module, and to on module terminations of the first module.

Abstract: A card retention assembly for retaining one or more expansion cards within the chassis of an electronic device such as a computer system, server, photocopier, facsimile machine, printer, or the like includes a card retention assembly that engages the mounting bracket securing tab of an expansion card received in the chassis. In this manner, the card retention assembly at least partially restrains the tab for securing the expansion card in the chassis.